src/notification_list.c

   1 /*
   2  *  libnotification
   3  *
   4  * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
   5  *
   6  * Contact: Seungtaek Chung <seungtaek.chung@samsung.com>, Mi-Ju Lee <miju52.lee@samsung.com>, Xi Zhichan <zhichan.xi@samsung.com>, Youngsub Ko <ys4610.ko@samsung.com>
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  * http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  *
  20  */
  21
  22 #include <stdlib.h>
  23
  24 #include <notification.h>
  25 #include <notification_list.h>
  26 #include <notification_debug.h>
  27 #include <notification_internal.h>
  28
  29 struct _notification_list {
  30         notification_list_h prev;
  31         notification_list_h next;
  32
  33         notification_h noti;
  34 };
  35
  36 notification_list_h _notification_list_create(void)
  37 {
  38         notification_list_h list = NULL;
  39
  40         list = (notification_list_h) malloc(sizeof(struct _notification_list));
  41         if (list == NULL) {
  42                 NOTIFICATION_ERR("NO MEMORY");
  43                 return NULL;
  44         }
  45
  46         list->prev = NULL;
  47         list->next = NULL;
  48
  49         list->noti = NULL;
  50
  51         return list;
  52 }
  53
  54 EXPORT_API notification_list_h notification_list_get_head(notification_list_h list)
  55 {
  56         notification_list_h cur_list = NULL;
  57
  58         if (list == NULL) {
  59                 NOTIFICATION_ERR("INVALID DATA : list == NULL");
  60                 return NULL;
  61         }
  62
  63         cur_list = list;
  64
  65         while (cur_list->prev != NULL) {
  66                 cur_list = cur_list->prev;
  67         }
  68
  69         return cur_list;
  70 }
  71
  72 EXPORT_API notification_list_h notification_list_get_tail(notification_list_h list)
  73 {
  74         notification_list_h cur_list = NULL;
  75
  76         if (list == NULL) {
  77                 NOTIFICATION_ERR("INVALID DATA : list == NULL");
  78                 return NULL;
  79         }
  80
  81         cur_list = list;
  82
  83         while (cur_list->next != NULL) {
  84                 cur_list = cur_list->next;
  85         }
  86
  87         return cur_list;
  88 }
  89
  90 EXPORT_API notification_list_h notification_list_get_prev(notification_list_h list)
  91 {
  92         notification_list_h cur_list = NULL;
  93
  94         if (list == NULL) {
  95                 NOTIFICATION_ERR("INVALID DATA : list == NULL");
  96                 return NULL;
  97         }
  98
  99         cur_list = list;
 100
 101         return cur_list->prev;
 102 }
 103
 104 EXPORT_API notification_list_h notification_list_get_next(notification_list_h list)
 105 {
 106         notification_list_h cur_list = NULL;
 107
 108         if (list == NULL) {
 109                 NOTIFICATION_ERR("INVALID DATA : list == NULL");
 110                 return NULL;
 111         }
 112
 113         cur_list = list;
 114
 115         return cur_list->next;
 116 }
 117
 118 EXPORT_API notification_h notification_list_get_data(notification_list_h list)
 119 {
 120         notification_list_h cur_list = NULL;
 121
 122         if (list == NULL) {
 123                 NOTIFICATION_ERR("INVALID DATA : list == NULL");
 124                 return NULL;
 125         }
 126
 127         cur_list = list;
 128
 129         return cur_list->noti;
 130 }
 131
 132 EXPORT_API notification_list_h notification_list_append(notification_list_h list,
 133                                                         notification_h noti)
 134 {
 135         notification_list_h new_list = NULL;
 136         notification_list_h cur_list = NULL;
 137
 138         if (noti == NULL) {
 139                 NOTIFICATION_ERR("INVALID DATA : data == NULL");
 140                 return NULL;
 141         }
 142
 143         if (list != NULL) {
 144                 cur_list = notification_list_get_tail(list);
 145
 146                 new_list = _notification_list_create();
 147                 if (new_list == NULL) {
 148                         NOTIFICATION_ERR("NO MEMORY");
 149                         return NULL;
 150                 }
 151
 152                 cur_list->next = new_list;
 153                 new_list->prev = cur_list;
 154
 155                 new_list->noti = noti;
 156         } else {
 157                 cur_list = _notification_list_create();
 158                 if (cur_list == NULL) {
 159                         NOTIFICATION_ERR("NO MEMORY");
 160                         return NULL;
 161                 }
 162
 163                 new_list = cur_list;
 164                 new_list->noti = noti;
 165         }
 166
 167         return new_list;
 168 }
 169
 170 EXPORT_API notification_list_h notification_list_remove(notification_list_h list,
 171                                                         notification_h noti)
 172 {
 173         notification_list_h cur_list = NULL;
 174         notification_list_h prev_list = NULL;
 175         notification_list_h next_list = NULL;
 176
 177         cur_list = notification_list_get_head(list);
 178         while (cur_list != NULL) {
 179                 if (cur_list->noti == noti) {
 180                         //remove
 181                         prev_list = cur_list->prev;
 182                         next_list = cur_list->next;
 183
 184                         if (next_list != NULL) {
 185                                 if (prev_list != NULL) {
 186                                         prev_list->next = next_list;
 187                                         next_list->prev = prev_list;
 188                                 } else {
 189                                         next_list->prev = NULL;
 190                                 }
 191                         } else {
 192                                 if (prev_list != NULL) {
 193                                         prev_list->next = NULL;
 194                                 }
 195                         }
 196
 197                         free(cur_list);
 198                         break;
 199                 }
 200
 201                 cur_list = cur_list->next;
 202         }
 203
 204         if (prev_list != NULL) {
 205                 return notification_list_get_head(prev_list);
 206         } else if (next_list != NULL) {
 207                 return next_list;
 208         }
 209
 210         return NULL;
 211 }